LG Washer Error Code H6

H6 on an LG washer indicates a wash heater error. The machine monitors water temperature during heated wash programs and triggers H6 when the water temperature fails to rise more than 2 degrees Celsius within a 15-minute period. This points to a problem with the wash heating element or its supply circuit. The washer stops the cycle to prevent running a wash program without effective heating.

You should not continue running heated wash cycles while H6 is active, as the heater is not functioning and the wash results will be inadequate for programs that require elevated water temperatures. The washer itself is unlikely to pose an immediate safety hazard from a failed heater, but running cycles while ignoring the fault can mask underlying electrical issues that should be addressed promptly.

Performing a reset by unplugging the washer for a few minutes may temporarily clear the H6 code, but the error will return as soon as the machine runs a heated wash cycle and detects no temperature rise again. The underlying fault with the wash heater or its circuit must be diagnosed and repaired for the code to be permanently resolved.

A knowledgeable DIYer can address this repair, but it does involve working with the electrical components of the washer. The recommended first step is replacing the wash heater element. Before ordering parts, use a multimeter to check the element for continuity and inspect the wiring harness for visible damage, which may save you from an unnecessary part purchase.

If only the wash heating element needs replacement, parts typically range from around $20 to $80 depending on the specific model. Professional labor to diagnose and replace the element can add $100 to $200 or more to the total cost. If the control board is the root cause, board replacement costs are significantly higher, often ranging from $150 to $350 for the part alone.